Listen Technologies LT-84 User manual

ListenTech-Note
Doc. # LTN0035 Page 1 of 2 Revision: 04-25-18
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Remote Powering the LT-84 Transmitter/Radiator Combo
OVERVIEW:
In the event an AC outlet is not located close to the LT-84 Transmitter/Radiator mounting location, it may
be necessary to remotely locate the power supply and run cable to the LT-84. There are two options
available to remotely power the LT-84. This tech note outlines the cable distances that can be achieved
with each option along with the number of Expansion Radiators (LA-141) supported. If more than two
expansion radiators will be connected to the LT-84, then an AC outlet near the LT-84 will be required.
OPTION 1: Remote Powering the LT-84 using CAT-5 cable (24 AWG)
This option requires the purchase of Listen’s LPT-A117 remote power supply kit (MSRP $9.00).
This kit converts the power supply barrel connector to an RJ-45 connector so that standard CAT-5 cable
can be used between the power supply and the LT-84, as shown below. The CAT-5 cable must be 24
AWG to achieve the distances listed in the table below. This option can be used with a standalone LT-84
or an LT-84 with one LA-141 Expansion Unit. To support up to two LA-141’s, proceed to option 2.
Option 1: Maximum Distance using CAT-5 Cable (24 AWG)
LT-84
Standalone
LT-84 plus (1) LA-141
Expansion Radiator
Maximum CAT-5 cable distance
between the power supply and LT-84
30 m. (100 ft.)
12 m. (40 ft.)

ListenTech-Note
Doc. # LTN0035 Page 2 of 2 Revision: 04-25-18
OPTION 2: Remote Powering the LT-84 using Speaker Wire (14 AWG)
This option requires the purchase of connectors not supplied by Listen.
Vetco Electronics ™ - www.Vetco.net Part Numbers: PH-48-1262B and PH-48-1268B (2.5mm DC Power
Inline Jack –Solderless w/Screw Terminals –2” Pigtail)
This option converts the power supply barrel connector to a terminal connector so that standard 14
AWG speaker wire can be used between the power supply and the LT-84 as shown below. The speaker
wire must be 14 AWG to achieve the distances listed in the table. This option can be used with a
standalone LT-84, an LT-84 with one LA-141 Expansion Unit or an LT-84 with two LA-141 Expansion
Units.
* Each expansion radiator MUST be connected directly to its own dedicated RJ-45 output jack on the LT-84.
You cannot daisy-chain the expansion radiators when remote powering the LT-84.
Please contact Listen Technologies with additional questions at [e-mail] or
1-800-330-0891.
Option 2: Maximum Distance using Speaker Wire (14 AWG)
LT-84
Standalone
LT-84 plus (1) LA-141
Expansion Radiator
LT-84 plus (2) LA-141
Expansion Radiators
Maximum Speaker Wire
Distance between the
Power Supply and LT-84
122 m. (400 ft.)
61 m. (200 ft.)
38 m. (125 ft.) *